JUST TO BRING THIS UP TO DATE ALL THE SHAKING AND RUMBLING WAS DUE TO A BAD MOTOR MOUNT.yES THE ENGINE WAS ACTING LIKE IT HAD SEVERAL VACUME LEAKS .THE BOTH FRONT MOUNTS WERE OLD AND STRESSED FROM MANY MILES AND SOM OIL DAMAGE ON THE LEFT SIDE ..FROM POWER STEERING OIL LEAK...........AFTER THE REPLACEMENT she SMOOTHED RIGHT OUT.........